Jets provide a compelling tool to pursue these questions.
Depending on their transverse momentum (\(p_{\mathrm {T}}\) ) and substructure,
jets can probe from the smallest medium scales to the largest medium scales,
and jet evolution can be computed from first principles.
Accordingly, a major experimental and theoretical jet physics program has developed
over the last two decades at the Relativistic Heavy Ion Collider (RHIC)
and the Large Hadron Collider (LHC), where ultrarelativistic heavy-ion
collisions create short-lived droplets of QGP.[1]}, [2]}
